Thanks for the update. Right now, let's make sure that the counter input are reading simple event counting properly. So, generate the pulse train with one of the counter outputs as you did before and then just read the count number and make sure that functionality is working correctly. It is probably best to use a shipping example for your pulse output if you are not doing so already.
Once we get this part working, then try the same thing with your external signal to make sure the module is reading those pulses. One final thing: could you please let me know what revision of the FieldPoint backplane you have? Please let me know if you are able to successfully perform these operations and I will continue to work with you on this.
Thanks for the update. It sounds like we are starting to make some good progress towards getting the frequency measurement working. As for the backplane revision: if you look on the bottom, you should see a part # and serial #. The part number should be a series of numbers and letters with a -01 or something similar at the end. The last letter before the - is the revision of the backplane.
Now that the counting part of the application is working, have you had a chance to configure everything again for the frequency measurement? Let me know which revisions of the backplane you have and try the frequency measurement with the pulse still being generated from the FieldPoint Counter module. Please continue to keep me posted.
Hi Hal -
Sorry for the long break - I've been quite busy and haven't had too much of a chance to work on this project.
I've been looking into this, and I wasn't looking any farther in this than trying to get just one channel to measure frequency properly. After looking, I realized the maximum number of individual frequency measurements I can make on one CTR-500 module with this low frequency example is 4, unless I'm mistaken. Is that the case? Each frequency measurement requires its own gating channel. If that is the case, this method will not work for me at all. I need as many frequency measurement channels as possible. For now, I'm going to have to put this counter thing on hold. I'm looking into building a frequency-to-voltage conversion board that I can put in my system and use voltage analog input modules to measure that. I've got a few sample chips on the way, we'll see how that goes. If you have any advice or experience with how well those work or any pitfalls, I would welcome it.
Thanks for the help, Hal. I appreciate it a lot.